PROD TM0181 - DOMAIN - Child Domain promoted within the Forest

SecurityEvent 
| where EventID == 5137 and EventData has '"ObjectClass">crossRef' and EventData has 'CN=Partitions,CN=Configuration'
| extend ObjectName = extract("(?i)CN=([^,]+),(?i)CN=Partitions,(?i)CN=Configuration", 1, EventData)
| extend ActivityType = extract("([a-zA-Z]+)\\.$", 1, Activity)
| extend Domain = extract("([^.]+\\.[^.]+)$", 1, Computer)
| project TimeGenerated
        , ObjectName
        , ActivityType
        , Account
        , Domain
        , Computer
        , Channel
        , EventID
        , EventData

customDetails:
  ObjectName: ObjectName
  Computer: Computer
  EventID: EventID
  ActivityType: ActivityType
  Account: Account
  Domain: Domain
  Channel: Channel
  EventData: EventData
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: ObjectName
    identifier: FullName
- entityType: Host
  fieldMappings:
  - columnName: Computer
    identifier: HostName
- entityType: Account
  fieldMappings:
  - columnName: Account
    identifier: FullName
tactics:
- PrivilegeEscalation
status: Available
queryPeriod: 1h
queryFrequency: 1h
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    reopenClosedIncident: false
requiredDataConnectors:
- connectorId: SecurityEvents
  dataTypes:
  - SecurityEvent
- connectorId: WindowsSecurityEvents
  dataTypes:
  - SecurityEvent
severity: High
relevantTechniques:
- T1484.002
name: PROD (TM018.1) - DOMAIN - Child Domain promoted within the Forest
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Active%20Directory%20Tier%20Model/Analytic%20Rules/TM018_DOMAINChildDomainPromotedWithinTheForest.yaml
eventGroupingSettings:
  aggregationKind: AlertPerResult
description: |
  New child domain has been promoted within the Forest and should have the Tier Model deployed.
triggerOperator: gt
alertDetailsOverride:
  alertDescriptionFormat: New child domains do not have a Tier Model by default. Deploy and configure the Tier Model within the new child domain.
  alertDisplayNameFormat: (TM018.1) A new Child Domain has been promoted and requires the Tier Model to be deployed
id: ff1bec81-e241-44bf-98ed-c6e37805a2e3
version: 1.0.0
triggerThreshold: 0
query: |
  SecurityEvent 
  | where EventID == 5137 and EventData has '"ObjectClass">crossRef' and EventData has 'CN=Partitions,CN=Configuration'
  | extend ObjectName = extract("(?i)CN=([^,]+),(?i)CN=Partitions,(?i)CN=Configuration", 1, EventData)
  | extend ActivityType = extract("([a-zA-Z]+)\\.$", 1, Activity)
  | extend Domain = extract("([^.]+\\.[^.]+)$", 1, Computer)
  | project TimeGenerated
          , ObjectName
          , ActivityType
          , Account
          , Domain
          , Computer
          , Channel
          , EventID
          , EventData

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/ff1bec81-e241-44bf-98ed-c6e37805a2e3')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ff1bec81-e241-44bf-98ed-c6e37805a2e3')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "New child domains do not have a Tier Model by default. Deploy and configure the Tier Model within the new child domain.",
          "alertDisplayNameFormat": "(TM018.1) A new Child Domain has been promoted and requires the Tier Model to be deployed"
        },
        "alertRuleTemplateName": "ff1bec81-e241-44bf-98ed-c6e37805a2e3",
        "customDetails": {
          "Account": "Account",
          "ActivityType": "ActivityType",
          "Channel": "Channel",
          "Computer": "Computer",
          "Domain": "Domain",
          "EventData": "EventData",
          "EventID": "EventID",
          "ObjectName": "ObjectName"
        },
        "description": "New child domain has been promoted within the Forest and should have the Tier Model deployed.\n",
        "displayName": "PROD (TM018.1) - DOMAIN - Child Domain promoted within the Forest",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "ObjectName",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Account",
                "identifier": "FullName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": false,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft%20Active%20Directory%20Tier%20Model/Analytic%20Rules/TM018_DOMAINChildDomainPromotedWithinTheForest.yaml",
        "query": "SecurityEvent \n| where EventID == 5137 and EventData has '\"ObjectClass\">crossRef' and EventData has 'CN=Partitions,CN=Configuration'\n| extend ObjectName = extract(\"(?i)CN=([^,]+),(?i)CN=Partitions,(?i)CN=Configuration\", 1, EventData)\n| extend ActivityType = extract(\"([a-zA-Z]+)\\\\.$\", 1, Activity)\n| extend Domain = extract(\"([^.]+\\\\.[^.]+)$\", 1, Computer)\n| project TimeGenerated\n        , ObjectName\n        , ActivityType\n        , Account\n        , Domain\n        , Computer\n        , Channel\n        , EventID\n        , EventData\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1484.002"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1484"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}